Portmaster for Windows

Safing ICS Technologies GmbH · Open source

Portmaster is a free, open-source application firewall from Safing. It shows which addresses each program on your computer connects to, lets you block trackers and ad domains, and lets you restrict internet access per app.

Download for Windows

updates.safing.io · Official website

✓ Official source (winget)
✓ SHA256 taken from the official repository
✓ Last checked: Nov. 4, 2026
This is not a virus scan. Check on VirusTotal

Version: 2.2.8
Release date: Oct. 27, 2026
License: GPL-3.0
Installer type: nullsoft

Install from the command line

How do I use this?

Type Terminal in the Start menu and open it, paste the command (Ctrl+V or right-click) and press Enter. It uses winget, Windows' own package manager, to install the program from its official source.

winget install --id Safing.Portmaster -e

SHA256 (file verification)

461370a8bfd961ce197f926e9675860a19c333082f39ac8153582734563a8d21

How to install

Click the official download button on this page.
Run the installer as administrator.
Open Portmaster and start by watching connections with the default settings.

Platform pages: Windows · macOS · Linux · Android · All platforms and details